HALO NEW ICON SET (XHDPI ONLY!)

Change-Id: I83f6bba92c14688a98c09a4722e195b6b01ce93b

Conflicts:
	packages/SystemUI/res/drawable-xhdpi/halo_back_left.png
	packages/SystemUI/res/drawable-xhdpi/halo_back_right.png
	packages/SystemUI/res/drawable-xhdpi/halo_dismiss.png
HALO dismiss/flip fix, clearall/last-notif-empty fix

Change-Id: I56eeb6891af2130584620d9bc596c3f0295f2402

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/halo/Halo.java
HALO first-run turorial less choppy + overlay

Change-Id: Ib33798ae6e2f36305c07556e32206d86809a8ec0
derp

Change-Id: Ia8312827ede988cb754aab8cf6e3667e49f56a5a
Add HDPI And MDPI Icon Set For HALO!